Confirming a completition item throws an error

[Je12emy]

Hi! I'm migrating my old manual set-up into lsp-zero. Everything is working as expected besides confirming a completition item (c-y). Here's the error throw.

E5108: Error executing lua ...al/share/nvim/lazy/LuaSnip/lua/luasnip/nodes/snippet.lua:200: attempt to call field 'ternary' (a nil value)
stack traceback:
        ...al/share/nvim/lazy/LuaSnip/lua/luasnip/nodes/snippet.lua:200: in function 'init_snippet_context'
        ...al/share/nvim/lazy/LuaSnip/lua/luasnip/nodes/snippet.lua:269: in function 'parse_snippet'
        ...nvim/site/pack/packer/start/LuaSnip/lua/luasnip/init.lua:364: in function 'lsp_expand'
        ...local/share/nvim/lazy/lsp-zero.nvim/lua/lsp-zero/cmp.lua:263: in function 'expand'
        .../jeremy/.local/share/nvim/lazy/nvim-cmp/lua/cmp/core.lua:472: in function <.../jeremy/.local/share/nvim/lazy/nvim-cmp/lua/cmp/core.lua:423>
        ...ocal/share/nvim/lazy/nvim-cmp/lua/cmp/utils/feedkeys.lua:47: in function <...ocal/share/nvim/lazy/nvim-cmp/lua/cmp/utils/feedkeys.lua:45>

Looks like this is mostly a luasnipt issue, but I'm not sure where to look for in the documentation... Here are my dotfiles with the relevant configuration.

return {
    {
        'VonHeikemen/lsp-zero.nvim',
        branch = 'v2.x',
        dependencies = {
            { 'neovim/nvim-lspconfig' },
            {
                -- Optional
                'williamboman/mason.nvim',
                build = function() pcall(vim.cmd, 'MasonUpdate') end
            }, { 'williamboman/mason-lspconfig.nvim' },
            -- Autocompletion
            {
                'hrsh7th/nvim-cmp',
                dependencies = {
                    "onsails/lspkind.nvim", "rafamadriz/friendly-snippets"
                }
            },
            { 'hrsh7th/cmp-nvim-lsp' },
            { 'L3MON4D3/LuaSnip' }

        },
        config = function()
            local lsp = require('lsp-zero').preset({})
            local tools = require 'je12emy.utils.lsp-tools'

            lsp.on_attach(function(client, bufnr)
                tools.on_attach(client, bufnr)
                lsp.buffer_autoformat()
            end)

            require('lspconfig').lua_ls.setup(lsp.nvim_lua_ls())

            lsp.setup()

            local cmp = require('cmp')
            require('luasnip.loaders.from_vscode').lazy_load()

            cmp.setup({
                completion = { autocomplete = false },
                mapping = {
                    ['<C-Space>'] = cmp.mapping.complete(),
                },
                sources = { { name = 'nvim_lsp' }, { name = 'luasnip' } },
                formatting = {
                    fields = { 'abbr', 'kind', 'menu' },
                    format = require('lspkind').cmp_format({
                        mode = 'symbol_text',
                        maxwidth = 50, -- prevent the popup from showing more than provided characters
                        ellipsis_char =
                        '...'          -- when popup menu exceed maxwidth, the truncated part would show ellipsis_char instead
                    })
                }
            })
        end
    }
}

For reference here my nvim version:

$ nvim --version
NVIM v0.9.0-dev-952+g20c9f4b35
Build type: Debug
LuaJIT 2.1.0-beta3

[VonHeikemen]

Error message suggest luasnip is trying to use a function called ternary, but that function doesn't exists.

Your configuration looks fine. Maybe try to update your plugins, see if they fixed that bug.

[Je12emy]

I just updated all my plugins, and the error still shows up for me. I'm using Lazy as my package manager, so I wonder if this is somewhat relevant. Should I report this issue in the LuaSnip repository? I forgot to mention my nvim version, I've added it to the thread

[Je12emy]

Solved by using the a major release version rather than using the master branch. Here's a snippet of code taken from the LuaSnip repository.

{
	"L3MON4D3/LuaSnip",
	-- follow latest release.
	version = "<CurrentMajor>.*", -- Replace <CurrentMajor> by the latest released major (first number of latest release)
	-- install jsregexp (optional!).
	build = "make install_jsregexp"
}